Question

How many lines other than those shown in the figure are required to join each corner with another?

A 56 Correct Answer Incorrect Answer
B 48 Correct Answer Incorrect Answer
C 20 Correct Answer Incorrect Answer
D 32 Correct Answer Incorrect Answer

Solution

The number of diagonals in a polygon of n sides is given by n(n-3)/2 Hence in an octagon (number of sides = 8) is given by 8(8-3)/2=20.

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